A336742 Number of self-avoiding cycles of length 2n on the half-Manhattan lattice.

1, 0, 1, 1, 2, 6, 17, 49, 156, 520, 1762, 6110, 21713, 78469, 287393, 1065951, 3998286, 15140500, 57817817, 222478829, 861952579, 3360043843, 13171307962

Offset: 0

Author

Sean A. Irvine, Aug 02 2020

Keywords

• nonn
• walk
• more

Comments

In the half-Manhattan lattice, E-W streets run alternately E and W, but N-S streets are two way.

Links

• Sean A. Irvine, Java program (github)

Crossrefs

Cf. A336724 (self-avoiding walks), A006781 (Manhattan lattice), A006782 (L-lattice), A002931 (square lattice).